JDK9 Reference To Internal APIs

[ghost]

When running with Jigsaw b162 or later with --permit-illegal-access, the following warnings are generated.
This is due to use of setAccessible to break into JDK classes.

WARNING: Illegal access by org.jboss.classfilewriter.ClassFile$1 (file:/modules/org.jboss.classfilewriter.jboss-classfilewriter.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Illegal access by org.jboss.classfilewriter.ClassFile$1 (file:/modules/org.jboss.classfilewriter.jboss-classfilewriter.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)

[manovotn]

Similar problem as in WELD-2367. So far it seems that for JDK 9 the only viable way is to use Unsafe.defineClass.

Similar problem described here (cglib) - cglib/cglib#93
Commit resolving this issue in JDK 9 - cglib/cglib@d6fe1d8

For some reason, Unsafe is an exception in JDK 9 and you can call setAccessible there.

[ghost]

Unsafe.defineClass went away in JDK11.
The only approach is Classloader.defineClass.

[manovotn]

This is no longer a problem and should be closed, see #16.